Keystones — Lintel
Five GCSE retrieval questions · 20 June 2013 · mathsvault.uk/keystones
-
1. Number Converting to standard form
Write 0.0021 in standard form
Answer: 2.1 × 10-3 -
2. Algebra Factorising monic quadratics
Factorise: x² + 3x - 88
Answer: (x + 11)(x - 8) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 15cm, angle = 51°. Find opposite. Give your answer to 2 decimal places
Answer: 18.52cm -
4. Ratio Mixed ratio problems
Simplify the ratio kg : 800g
Answer: 5:4 -
5. Statistics Mean
Calculate the mean of: 49, 40, 38, 9, 5, 9
Answer: 25